Lacing beveller



Patented Jan. 13, 1948 UNED STATES TENT OFFICE 6 Claims.

The present invention relates to improvements in a beveller for bevelling leather lacings wherein juxtaposed form and juxtaposed holing and seating rollers operate in conjunction with drawing or pulling rollers to present the longitudinal edges of the underside of a continuous lacing in transverse V-shape form to a cutter, whereby said lacing may be bevelled to facilitate the formation of said lacing into a flat bottom and a rounded or cfnvex grained upper surface. with suflicient width to impart stability to said lacing.

In the present state of the art of producing hand-wrought leather, a continuous lacing of leather is required for the purpose of binding together certain parts as well as for the purpose, in some cases, of weaving, through apertures, a more or less conventional design. It is highly essential that the lacing be uniform in transverse section throughout, and the type most genn erally used is a fiat lacing with the top or grain surface convex and with the sides thereof of suficient width to produce stability of structure, and also produce an artistic and pleasing appearance.

Heretofore, considerable difficulty has been met in attempting to produce a lacing that is not only uniform and constant in cross section throughout, but of a uniform convexity and stability on the top or grain side thereof. Frequent experiment and actual practice has demonstrated that the best results are obtained in producing a con- Vex lacing of uniform section throughout by first skiving a flat lacing to the required thickness, then forming said lacing into a V transversely, with the grain side outside or at the apex,r and while thus formed to bevel off the outermost edges on the inner side of said lacing. after which the lacing is passed to a forming device which, while no part of the present invention, is facilitated by the bevelling of the inner corners of said lacing.

The primary object of the present invention is to provide a new and improved lacing beveller having improved means for bevelling the corner edges of the under side of a lacing to facilitate the formation thereof into a flat lacing with a rounded convex top side, throughout the length thereof.

Another object is to provide a new and improved device of the character set forth having a greatly simplified and economically produced i construction.

A further object is tc provide a new and improved machine of the type described which is compact, requires a minimum amount of power for its operation, and has a maximum efficiency,v

The invention consists in the particular details of construction and arrangement of parts as disclosed in the drawings forming a part of the present invention, and in which- Fig. 1 is a partly broken front elevation of the device; I

Fig. 2 is a partly broken plan view, with a lacing indicated in dotted lines;

Fig. 3 is an enlarged detailed View of a pair of juxtaposed forming rollers;

Fig. 4 is a still further enlarged and broken schematic view of the seating and hclding rollers, and the relation of a cutter thereto; and

Fig. 5 is a still further enlarged transverse sectional view of a lacing after being bevelled, in full lines. and its ultimate formation or section in dotted lines.

Referring to the drawings:

The numeral l is used to designate a base having a preferably vertically disposed plate 2 thereon, near what I term the front end thereof is rotatably mounted a high speed milling cutter 3 while a suitably knurled drawing or pulling roller 4 is rotatably mounted near the rear end of said plate 2, both being connected to power sources, not shown. Grooved rollers or idlers 6 and i are rotatably mounted upon the free ends of spring controlled tension bars 9 and lli, respectively, whose opposite ends are pivotally mounted upon the plate 2. A simple roller I2 is mounted above the drawing roller 4 and upon one end of another spring controlled tension bar I@ whose opposite end also is pivotally mounted upon said plate 2, -while an idler I6 is rotatably mounted adjacent the rear end of said plate 2.

Adjacent the top edge of the plate 2 I have provided a lever 22 whose pivot 24 is slidably mounted within a slot 26 in the plate 2 for adjustment purposes. The free end of the lever 22 is held by a spring 28 against an adjustable stop 29 upon the front edge of the plate 2, the purpose of which hereinafter more fully will be set forth.

A pair of juxtaposed forming rollers comprises a roller Se rotatably mounted upon the lever 22 and provided with a groove 32 with a convex bead or rim Sli in the bottom of said groove 32, and a roller 3S having a ange 38 arranged to t within the groove 32 of the roller 30, and having a concaved V-groove All arranged to engage the convex bead or rim 34 of the roller 3B. The roller 3e is rotatably mounted upon one end of a bell crank 42 having a spring 44 arranged to normally urge and retain engaging relation between the rollers 30 and 36, or, more particularly between the peripheries of the concaved groove 40 and bead or rim 34.

What I term a holding roller 46 is rotatably mounted upon the lever 22 and directly above the milling cutter 3, and is provided with a V- groove 46, slightly rounded at the bottom thereof and of slightly less depth than the V-groove 40 of the ange 38 on roller 36. A seating roller 52 is slidably mounted upon the lever 22 and a spring 54 normally operates to press an inverted V or bead 56 thereon into the V-groove 48 of the holding roller 46.

In operation:

-A lacing 60, which has been skived to provide a uniform rectangular transverse cross section and thickness throughout, is threaded over the idler 6. an idler 62 rotatably mounted upon the lever 22, thence between the forming rollers 30 and 36, between the holding and seating rollers 46 and 52, respectively, an idler 64 on lever 22, thence over the roller 'I on the tension bar ID, thence under and nearly around the drawing or pulling roller 4 and then between said pulling roller 4 and a spring controlled contact roller I2 on the tension bar I4, thence over the last idler I6, and from the machine, as fully disclosed in Fig. 1 of the drawings.

From its power source, not shown, the high speed milling cutter 3 is rapidly rotated, and the feeding roller is rotated at a speed from its source, not shown, which will draw or pull the lacing through the machine and around the various rollers and idlers at a required speed and tension.

As the lacing passes between the forming rollers 3U and 36. the V-groove 40 forms said lacing 60 into a V transversely over the convex V 34 of the roller 3D, as disclosed in Fig. 3 of the drawings.

This initial transverse V-formation of the lacing 6|) is provided in order that said lacing more eiiciently and completely may be seated within the groove 48 of the holding roller 46, which groove. as hereinbefore set forth, is of lesser depth than the groove 40 of roller 36, so that the edges or longitudinal corners of the lacing 6U opposite the grain side thereof are'extended beyond the edges of the annular groove 48 and also beyond the periphery of the holding roller 46. notwithstanding the action of the seating roller 52 which operates to press the now transversely shaped V-lacing firmly into the full depth of said groove 48. as fully disclosed in enlarged detail at the left side of Fig. 4 of the drawings.

The lacing 60 is threaded through the several sets of rollers and around idlers so that the edges or corners of the side opposite the grain side of said lacing as it passes around the holding roller 46 are outermost and therefore cut off or bevelled by the rapidly rotating milling cutter 3. as fullv disclosed in greatly enlarged form at the right hand end of Fig. 4 of the drawings. After passing over the idler 64 on lever 22, which idler operates. in conjunction with the seating roller 52. to provide sufficient arc of contact with said holding roller 46 and also tn assist in retaining said lacing 60 in V-form fully seated within the groove 48 during the bevelling operation. said lacing 60 then passes over the idler 'I on the spring controlled tension bar Ill. and under and around the roller 4 with which it is held in contact frictionally by the idler I2 upon the free end of the spring controlled tension bar I4. To secure sufficient frictional contact of the lacing 60 with the idler I 2, the lacing 60 is now oassed downwardly and under the last idler I6, and

thence from the device, to the next step for forming the ultimate and required cross section.

While the next step forms no part of the present invention, it is considered essential for a full comprehension of the present bevelling that the purpose of the same should be stated.

After leaving the roller 46, the lacing 60 is again attened throughout the rest of its journey through the beveller and presents a constantly uniform cross section as disclosed in greatly enlarged form in full lines in Fig. 5 of the drawings.

The bevelling of the lower corners of the lacing provides a cross section which will facilitate the formation of an ultimate constantly uniform cross section comprising a rounded convex top or grain side, with full fiat bottom and suicient straight sides to produce the form of lacing required, which ultimate cross section, for illustrative purposes only, is superimposed in dotted lines over Fig. 5 of the drawings.

It is obvious that the various idlers and tension bars will insure a smooth uniform passage of the lacing 60 through and around the several operations required i'or bevelling.

It is also obvious that by adjusting the stop 29 against the tension of the spring 28, the lever 22 may be readily adjusted to alter the distance between the holding roller and milling cutter to increase or decrease the amount of material removed from the corners of the lacing and thereby control and adjust the amount of bevelling required.

Having described my invention, I claim:

1. A lacing beveller comprising a pair of juxtaposed rollers arranged to form a lacing transversely into a. V; a holding roller arranged to hold said lacing with the edges of said V beyond the periphery of said holding roller; and a cutter arranged adjacent to said holding roller and also arranged-to bevel the edges of said lacing.

2. A lacing beveller comprising a pair of juxtaposed rollers arranged to form a lacing transversely into a V; a holding roller arranged to hold said lacing with the edges of said V projecting beyond the periphery of said holding roller; a cutter adjacent said holding roller and arranged to bevel said projecting edges; and regulating means arranged to adiust the position of said cutter relatively to said roller.

3. A lacing beveller comprising a pair of juxtaposed rollers arranged to form a lacing transversely into a V; a holding roller arranged to hold said lacing with the edges of said V projecting beyond the periphery of said holding roller; a cutter adjacent said holding roller and arranged to bevel said projecting edges; and a drawing roller arranged to frictionally engage said lacing and move the same longitudinally over said rollers and said edges in contact with said cutter.

4. A lacing beveller comprising a frame; a vertically disposed plate mounted upon said frame; a lever pivotally mounted upon said plate; a pair of juxtaposed forming rollers mounted upon said lever and arranged to form transversely into a V a lacing threaded between said forming rollers; a holding roller mounted upon said lever and grooved to hold said V with the edges thereof projecting beyond the periphery of said holding roller; a rotary cutter mounted upon said plate and adjacent said holding roller and arranged to bevel said projecting edges of said V; and adjusting means arranged to adiust said lever and holding roller thereon relatively to said cutter. y

5. A lacing beveller comprising a frame; a vertically disposed plate mounted upon said frame; a lever pivotally mounted upon said plate; a pair of juxtaposed forming rollers mounted upon said lever and arranged to form transversely into a V a lacing threaded between said forming rollers; a ho-lding roller mounted upon said lever and grooved to hold said V with the edges thereof projecting beyond the periphery of said holding roller; a rotary cutter mounted upon said plate and adjacent said holding roller and arranged to bevel said projecting edges of said V; adjusting means arranged to adjust said lever and holding roller thereon relatively to said cutter; a seating roller slidably and yieldingly mounted upon said lever and arranged to seat said V of said lacing within said groove of said holding roller; and tension means, comprising rollers mounted lupon said frame and arranged to engage said lacing and hold the same under constant uniform tension.

6. A lacing beveller comprising a frame; a vertically disposed plate mounted upon said frame; a lever pivotally and adjustably mounted upon said plate; a pair of juxtaposed forming rollers mounted upon said lever and arranged to form transversely into a V, a lacing threaded between said forming rollers; a holding roller mounted upon said lever and having an annular groove in the periphery thereof arranged to hold said V lacing within said groove with the edges of said V projecting beyond the periphery of said holding roller; a rotary cutter mounted upon said plate and adjacent said holding roller and arranged to bevel said projecting edges; a seating roller yieldingly and slidably mounted upon said lever and arranged to seat said V of said lacing within the annular groove of said holding roller; and a drawing roller mounted upon said plate and arranged to frictionally engage said lacing and draw the same between said juxtaposed forming rollers and over said holding roller.

WILLIAM E. AHLGREN. 

